<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body {
            background-color: #f2f2f2;
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }

        h1 {
            text-align: center;
            color: #333;
            margin-top: 30px;
        }

        .menu {
            text-align: center;
            margin-top: 20px;
        }

        .menu a {
            display: inline-block;
            text-decoration: none;
            padding: 10px 20px;
            margin: 5px;
            background-color: #007bff;
            color: #fff;
            border-radius: 5px;
        }

        .menu a:hover {
            background-color: #0056b3;
        }

        form {
            text-align: center;
            margin: 20px auto;
            max-width: 300px;
            padding: 20px;
            background-color: #fff;
            border-radius: 5px;
        }

        input[type="file"] {
            margin: 10px 0;
        }

        button {
            background-color: #007bff;
            color: #fff;
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }

        button:hover {
            background-color: #0056b3;
        }
    </style>
</head>
<body>
<h1>欢迎登录</h1>
<div class="menu">
    <a href="/login">登录</a>
    <a href="/register">注册</a>
    <a href="/showFile">文件下载</a>
    <a href="/online">管理用户</a>
    <a href="/update">修改密码</a>
    <a href="/loginOut">退出登录</a>
</div>
<form action="/uploadFiles" method="post" enctype="multipart/form-data">
    <input multiple type="file" name="file" id=""> <br>
    <button type="submit">上传</button>
</form>
</body>
</html>
